Oxygen solubility in silicon-containing Fe-Co melts

Александров, А. А.; Dashevskii, V. Ya.

doi:10.1134/s0036029513110025

Cited by 11 publications

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“…Further addition of aluminum elevates the oxygen concentration. Since the reducing properties of alu minum and silicon intensify with increase in cobalt content in Fe-Co melts [1,2], silicon's reinforcing effect on the reducing properties of aluminum is greater at higher cobalt content.…”

Section: Thermodynamic Analysis Of Oxygen Solutions In Fe-co-r'-r''-omentioning

confidence: 99%

“…The influence of aluminum and silicon individually on the oxygen solubility in Fe-Co melts was subjected to thermodynamic analysis in [1,2]. The next step is to assess their combined influence on the oxygen solubil ity in Fe-Co melts.…”

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“…Dependence of the oxygen concentration in Fe (a), Fe-20% Co (b), Fe-40% Co (c), Fe-60% Co (d), Fe-80% (e), and Co (f) melts on the aluminum and silicon content at 1873, with 0% Si (1), 0.05% Si(2,5), 0.1% Si(3,6), and 1.0% Si(4,7).…”

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Thermodynamics of oxygen solutions in the complex reduction of Fe-Co melts

2014

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Thermodynamic analysis of the complex reduction of metal melts is considered. The proposed analytical method identifies the influence of the weaker reducing agent in amplifying the effect of the stronger reagent. The curves of oxygen solubility pass through a minimum. Analysis of the extremal curves of oxygen concentration in the melt as a function of the content of reducing agents yields a formula for the content of the stronger reducing agent such that the oxygen concentration is minimal. Thermodynamic analysis of the combined influence of aluminum and silicon on the oxygen solubility in Fe-Co melts indicates that the reac tion products may contain both mullite (3Al 2 O 3 ⋅ 2SiO 2 ) and kyanite (Al 2 O 3 ⋅ SiO 2 ). The presence of silicon in the melt intensifies the reducing action of aluminum: slightly when mullite is formed and significantly when kyanite is formed. When kyanite is formed, the curves of oxygen solubility pass through a minimum, whose position depends on the aluminum content in the melt but not on the silicon content. The aluminum content at the minimum declines slightly from iron to cobalt, as for Fe-Co-Al systems. Further addition of aluminum elevates the oxygen concentration. The formation of the compounds Al 2 O 3 , 3Al 2 O 3 ⋅ 2SiO 2 , Al 2 O 3 ⋅ SiO 2 , and SiO 2 is investigated as a function of the Al and Si content in the melt.

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Section: Thermodynamic Analysis Of Oxygen Solutions In Fe-co-r'-r''-omentioning

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Thermodynamics of oxygen solutions in the complex reduction of Fe-Co melts

2014

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“…The value of interaction parameter is absent in the reference literature; it is taken to zero by analogy with vanadium solutions in iron-nickel melts [3]. Figure 1 shows the plot of the equilibrium constant of reaction (1) versus the cobalt content in the melt at 1873 K. The figure also shows the plots of the reaction equilibrium constant for vanadium deoxidation of Fe-Ni melts and the equilibrium constants of deoxi dation of Fe-Co melts with chromium [8], manga nese [9], silicon [10], and aluminum [11] at 1873 K. The equilibrium constants are given for the reaction of the deoxidant with one oxygen atom dissolved in the melt, which makes the comparison of these depen dences clearer. With an increase in the cobalt content in the Fe-Co melt, the equilibrium constant decreases continuously, which points to an increase in the deox idizing ability of vanadium.…”

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Thermodynamics of oxygen solutions in vanadium-containing Fe-Co melts

2015

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“…Значения конс тант равновесия реакции раскисления хромом и кремнием железокобальтовых сплавов, содержащих 10 и 20 % Co, а также значения параметров взаимодействия, характеризующие растворы кислорода в этих расплавах, приведены в таблице. Данные для сплавов Fe - 10 % Co и Fe - 20 % Co рассчитаны по методике, описанной в работах [6,9]. В расплавах Fe - 10 % Co и Fe - 20 % Co при 1873 К растворимость кислорода составляет 0,21 и 0,19 % соответственно [11].…”

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THERMODYNAMICS OF OXYGEN SOLUTIONS IN SILICON-CONTAINING Fe – Co – Cr MELTS

Александров

Дашевский

Леонтьев

2018

Izv. vysš. učebn. zaved., Čern. metall.

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Thermodynamic analysis of the effect of silicon on the solubility of oxygen in Fe – Co – Cr melts has been carried out at 1873 K. Silicon has a sufficiently high deoxidizing ability in Fe – Co – Cr melts. Silicon at low contents practically does not affect the concentration of oxygen in the melt, which is determined by the chromium content. With a higher content of silicon after changing the mechanism of interaction process of chromium and silicon with oxygen, when silicon already determines the solubility of oxygen in the melt, the oxygen concentration decreases.

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Oxygen solubility in silicon-containing Fe-Co melts

Cited by 11 publications

References 3 publications

Thermodynamics of oxygen solutions in the complex reduction of Fe-Co melts

Thermodynamics of oxygen solutions in the complex reduction of Fe-Co melts

Thermodynamics of oxygen solutions in vanadium-containing Fe-Co melts

THERMODYNAMICS OF OXYGEN SOLUTIONS IN SILICON-CONTAINING Fe – Co – Cr MELTS

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